Sponge Gold nugget from the 16 to 1 Mine in California

This sponge Gold Nugget from the 16 to 1 Mine in Alleghany, California is huge for the weight. It weighs 9.3 Grains (0.60 Gram) and has a huge surface area at 9/16" long x 1/2" wide. Sponge gold is so named because it has the look and characteristics of a sponge, with a coarse surface and a honeycombed structure. Sponge gold is extremely rare. This is a super nice sponge gold nugget specimen for the price.